Furnace



(No Model.)

E. R. HOWARD.

SMOKE AND GAS GONSUMING FURNAGE.

No. 341,008. Patented May 4, 1886.

I g n- I 0} l.. a o o 0 UNITED STATES PATENT OFFICE.

EVERETT R. HOWARD, OF AURORA, ILLINOIS, ASSIGNOR OF ONE-HALF 'IO ROSIVELL IV. GATES, OF SAME PLACE.

SMOKE AND GAS CONSUMING FURNACE.

SPECIFICATION forming part Of Letters Patent NO. 341,008, dated May 4, 1886.

A Application filed January 29,1886. Serial No. 190,155. (No model.)

To aZZ whom it may concern:

Be it know u that I, EVERETT R. HOWARD, a citizen of the United States of America, residing at Aurora, in the county of Kane and State of Illinois, have invented certain, new and useful Improvements in Smoke and Gas Consuming Furnaces, of which the following is a specification, reference being had therein to the accompanying drawings. 7

The nature of my invention relates to the construction of boiler-furnaces, with the object in view of consuming the smoke and gases generated from thefuel upon the grate; and it consists of the novel devices and combinations of devices hereinafter describedand specifically claimed.

In the accompanying drawings, Figure 1 represents a longitudinal vertical section of the furnace, and Fig. 2 a transverse vertical section on line 2 2 in Fig. 1.

Corresponding letters in both the figures of the drawings designate like parts.

A denotes the boiler, thatmay be of any usual construction, with flues for the returndraft. B is the boiler-front, G the grate, and D the ash-pit.

E is the bridge-wall extending from the rear end of the grate to near the rear end of the boiler and being inclined toward the rear, that by degrees the gas and smoke passage between such boiler and bridge-wall will be increased toward the rear. The rear end e of the bridgewall E slopes down on an angle of about fortyfive degrees, and from the extreme rear end of boiler A is built a pending wall, F, sup ported by an arch, f, and forming a partition or diaphragm, onlyleaving-between such arch f and the base of the furnace a shallow opening, for providing communication from the gas-channel under the boiler to smoke-chamber G, that again communicates with the return-fines projected through such boiler. A door, h, provides admission to or inspection of such smoke-chamber G.

Either longitudinally or transversely I build through the base of the furnace a channel or flue, H, with its exteriorlyprojecting ends communicating with the atmospheric air, which openings may be arranged to be closed or regulated by suitable valves. This chana cock against the bridge-wall and fresh fuel is shoveled upon the front part of the grate. The fuel} door and ash-pit door now being closed, to admit butvery little air to the burning fuel, the gases and smoke, principally consisting of hydrocarbon gases that are generated from such fuel during the coking process, will first pass over the incandescent coal, to be highly heated thereby, and will thence pass over the bridge-wall toward the rear end thereof, where these gases-are interposed on their direct course by the wall F. The gases in condition for combustion occupying more space than the products of combustion, such combustion diminishes their volume and thereby creates a partial vacuum, and on that account, 7 5

after combustion once has commenced in my furnace, such vacuum will produce a continuous suction of air from channel H through branch i, which air will be drawn into the space between boiler A and bridge-wall E;

but being cold, and therefore heavier than the gases, the air is not in condition to intermingle, but will pass below the gases toward the grate in a counter-current until in its course it is heated to the required degree, when,

with a whirl, such air will mix with the gases and its oxygen will unite by an explosion, thereby chemically uniting with the hydrocarbon and forming into carbonic acid and vapor of water, the principal products of combustion, that now will pass off through opening 9 into the smoke-chamber and thence through the return-fines in the boiler to the breeching and chimney. Part of the gases may pass through opening 9 into the smoke-chamber unconsumed, which, however, will there receive an additional supply of "oxygen from the air-supply through channel H and branch 1', to be readily burned before reaching the returnflues in the boiler.

In this manner no gases r00 or smoke can leave the several combustionchambers without utilizing fully their combustible qualities.

The products of combustion while passing through the return-fines in the boiler will give up therein the greater portion of their heat, and because such products of combustion, mainly consisting of carbonicacid gas and of vapor of water, and carrying no substance that may clog the surface of such return-fines and thereby diminish their l1eat-conducting capacity, a great saving of fuel is the result of my arrangement.

Vhat I claim is 1. In a boiler furnace, the combination, with the grate, bridge-wall, and smokechamber, of a pending rear wall providing the only communication to such smoke-chamber from under such wall, and ofan air-channel through the base of such furnace, communicating with 20 the gas-duct through an opening vertically below and opposite'to such pending wall, substantially as and for the purpose set forth.

2. In a boiler furnace, the combination, with the grate, bridge-wall, and smoke-cham- 25 her, of the pending rear wall, F,with passage g thereunder, and of channel H through the base of such furnace and communicating with passage 9 through opening i, that is vertically below and on a line with such pending wall, 0 substantially as and for the purpose set forth.

In testimony whereofI affix my signature in presence of two witnesses.

EVERETT B.- HOWVARD.

\Vitnesses:

ANTON SOHOENINGER, HARRIS WV. HUEHL,

l A i 

